组织多普勒成像技术观察心肌节段性早期松弛现象  

Study on segmental early relaxation phenomenon by tissue Doppler imaging

作　　者：黎志国[1] 张海滨[1] 刘成国[1] 侯锐[1] 朱苏阳[1] 

机构地区：[1]解放军210医院特诊科,辽宁大连116021

出　　处：《心脏杂志》2011年第3期368-371,共4页Chinese Heart Journal

摘　　要：目的:应用组织多普勒成像(TDI)技术研究节段性早期松弛现象(segmental early relaxation phenomenon,SERP)。方法:103例冠心病患者和50例健康志愿者,根据舒张早期心肌TDI速度曲线将左室各节段分为SERP、收缩期后缩短(PSS)和正常3种舒张方式,分析舒张方式与冠脉狭窄之间的关系。结果:SERP和PSS易出现于冠脉狭窄的节段(OR=4.39和5.59,均P<0.01);但对每一个患者而言,SERP更易出现于冠脉相对狭窄程度最轻的节段(OR=12.53,P<0.01),而PSS不易出现于冠脉相对狭窄程度最轻和中等的节段(OR=0.33和0.41,均P<0.01)。结论:在冠心病患者中舒张早期心肌峰值速度可出现于等容舒张期,这种现象易出现于缺血程度相对较轻的节段。AIM： To study the segmental early relaxation phenomenon （SERP） by tissue Doppler imaging （TDI）. METHODS： TDI was performed in 103 patients with coronary heart disease and 50 normal subjects. The segmental early diastolic velocity pattern was classified as SERP, postsystolic shortening （PSS） and normal pattern. Relations between the diastolic velocity pattern and coronary diameter stenosis were analyzed. RESULTS： SERP and PSS were significantly associated with actual coronary stenosis （ odds ratio =4.39 and 5.59, both P 〈0.01 ）. However, in each individual patient, SERP had a higher probability of appearing in the territory supplied by the artery with the relatively mildest stenosis （ odds ratio = 12.53, P 〈 0. 01 ） , whereas PSS had a lower probability in the territory with the relatively mihlest and secondary coronary stenoses （odds ratio = 0. 33 and 0. 41, P 〈 0. 01 ）. CONCLUSION： The segmental early diastolic peak velocity may appear in the isovolumic relaxation period and not necessarily only （luring the rapid filling phase. This phenomenon occurs more frequently in the perfusion territory of the artery with relatively mild stenosis, which may play a role in compensation for the delayed relaxation of PSS segments to maintain isovolumie status of the left ventricle.

关 键 词：超声心动描记术 组织多普勒成像 节段性早期松弛现象 收缩期后缩短 

分 类 号：R541.4[医药卫生—心血管疾病] R445.1[医药卫生—内科学]